Research on eco-aesthetic of urban form based on entropy theory

The urban ecosystem is an open system that is far away from balance state, according to the exchange of matter and energy between the urban system and eco-environment, whose change of entropy is composed of two parts: one part is positive entropy that is produced during the irreversible process of the urban system; the other part is negative entropy that is caused by exchange of matter and energy between urban system and eco-environment. The urban ecosystem should reduce the entropy increase by energy structure, industrial structure, spatial structure, technical structure and behavior structure. At the same time, the urban ecosystem should enhance the entropy flow by the CPUL, which is made up of productive urban sight, productive architectural form and productive landscape. Thus, the urban ecosystem can maintain a low entropy level and evolves to more orderly orientation by sustainable way.